Search published articles


Showing 3 results for Mandible
Forward movement of the lower mandible in the prediction of difficult intubation: a prospective study
Hussain Khan Z, Mirazimi F,
Volume 65, Issue 5 (8-2007)
Abstract
Background: Failed endotracheal intubation is one of the principal causes of morbidity and mortality in anesthetized patients. If the anesthetist can anticipate which patients may be more difficult to intubate, can reduce the risks of anesthesia greatly and be more prepared for any difficulties that may occur. The aim of this study was to investigate the inability of patients to protrude the lower jaw in predicting difficult intubation.
Methods: In this prospective study, we enrolled 300 patients, above 16 years of age or older, who were scheduled for elective surgery. For all of the patients, before each operation, a single anesthesiologist measured the temporomandibular mobility, which was defined as the difference between the distances, from the lower incisors to the upper incisors in a neutral position and at maximum mandibular protrusion. At the time of intubation, another anesthesiologist, blinded to the preoperative airway assessment test, performed a laryngoscopy in which the laryngoscopic view of the larynx was determined according to the Cormack and Lehane scoring system. Difficult intubation was defined as laryngoscopic views of grade III and IV.
Results: Twenty-one patients were identified as having difficult intubation. Only one patient could not be intubated. The forward movement of the mandible was significantly greater in patients with easy intubation compared to those with difficult intubation (6.42±1.95 mm vs. 3.58±1.26 mm respectively, P<0.001). The use of a cut-off point of less than 5 mm for prediction of difficult intubation showed a sensitivity of 92.86% and a specificity of 70.43%.
Conclusion: The forward movement of the mandible is significantly greater in patients with easy intubation compared those with difficult intubation Although infrequent difficulties may arise, most patients that do not have indicators of difficult intubation will be easy to intubate under anesthesia.
Mandibulo-Canine index value for sex identification
Akhlaghi M, Salavati M,
Volume 65, Issue 12 (3-2008)
Abstract

Background: The value of the mandibulo-canine index (MCI) in gender identification has been proved in some studies in various countries. The goal of our study was to determine the utility of MCI in gender identification in Iran.

Methods: This descriptional survey was performed on a group of 18- to 25-year-old Iranian students at the Tehran University of Medical Science. We included 50 males and 50 females that were selected using a single sampling method. Data were statistically analyzed by SPSS (v. 13) and t-test.

Results: No statistically significant difference was found between the mean ages of the two groups. Among men, the MCI ranged from 0.209 to 0.293, with a mean of 0.252. Among women, the MCI ranged from 0.202 to 0.276, with a mean of 0.245. There was significant statistical difference between the two means, (0.007 P value = 0.04). The standard MCI of 0.247 was compared to that of each gender, after which no significant statistical difference was found between the two genders (P value = 0.8).

Conclusions: Despite some studies performed in other countries displaying the usefulness of MCI in sex determination, our data did not support this conclusion. Perhaps this difference can be explained because of the variety ethnic groups from various cities of Iran represented in this research had some influence on the results.


Mandibular osteosarcoma presenting as a peripheral tumoral mass: a case report
Hamidreza Abdolsamadi , Pardies Mahmoudvand, Zahra Pourgholi Takrami , Elahe Alipour,
Volume 83, Issue 3 (6-2025)
Abstract

Background: Although osteosarcoma in the head and neck region is relatively rare accounting for 2.1% of all malignant oral and maxillofacial tumors it is nevertheless regarded as the most common primary malignant bone tumor in children and young adults. In the craniofacial skeleton its overall occurrence remains uncommon, and that rarity contributes to diagnostic difficulty and occasional delay. The neoplasm is recognized simultaneously for its infrequency and its malignant character, and these features together can obscure recognition when early symptoms are muted or resemble more benign oral conditions. Because presentations may be subtle, careful clinical attention to patient-reported sensations and visible mucosal or submucosal changes is advisable. Early complaints may initially involve tingling paresthesia or awareness of a focal oral mass. Vigilance matters in everyday oral and maxillofacial practice.
Case Presentation: The patient was a 38-year-old married man from Asadabad County, Hamedan Province, who presented to the Department of Oral and Maxillofacial Diseases at the School of Dentistry, Hamedan, during February March 2025. He reported a tingling, electric-shock like sensation together with a lesion on the floor of the mouth. The persistence of the sensation and the presence of a visible lesion prompted evaluation in a specialized academic clinic. The demographic context, the anatomic location in the floor of the mouth, and the clear time frame are central features of the presentation. The chief complaint centered on the peculiar sensation and the discernible lesion, which together motivated clinical assessment in an oral and maxillofacial setting.
Conclusion: This report highlights the importance of considering mandibular osteosarcoma in the differential diagnosis of peripheral tumoral lesions. Reporting such cases can improve understanding of unusual clinical presentations and assist in more accurate clinical decision-making. The central message is unchanged: clinicians should include mandibular osteosarcoma among diagnostic possibilities when encountering peripheral lesions so that evaluation proceeds thoughtfully.

Page 1 from 1     

© 2026 , Tehran University of Medical Sciences, CC BY-NC 4.0

Designed & Developed by : Yektaweb